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Data engineering interview questions · medium
Transformation vs. Action in PySpark?
What Hadoop command would you use to merge multiple files into one?
What are Spark Submit properties?
What are the key differences between Map and Reduce in Spark?
What are the key performance tuning techniques you apply in Spark jobs to improve performance?
What are the limitations of the REORG command with respect to large datasets?
What are the performance trade-offs of using salting to mitigate data skewness?
What are the steps to efficiently process 1 TB of data in Spark?
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